First Lady Michelle Obama, along with daughters Malia, 13, and Sasha, 10, hit up Beyonce's concert at Revel Beach's Ovation Hall in Atlantic City, NJ Saturday night. The performance was night two of the songstress' four-show return since giving birth to daughter Blue Ivy, her first child with husband Jay-Z, in January.

"They sat up in a private balcony with Gayle King. Michelle was jamming out to 'Crazy in Love,'" a concertgoer tells Us Weekly. "When Beyonce told the crowd to get up and jump, [Malia and Sasha] stood and started dancing and jumping. They were shouting when Beyonce asked, 'Do girls run the world?'"

In April, Beyonce, 30, wrote a public letter to President Obama's wife, 48, which she posted on her personal website. In the note, she wrote, "Michelle is the ultimate example of a truly strong African American woman. She is a caring mother, she's a loving wife, while at the same time, she is the First Lady!" before signing off with a giant thank you to the figure.

Two days later, Michelle responded to Beyonce's heartfelt words by tweeting from he verified Twitter account, "Thank you for the beautiful letter and for being a role model who kids everywhere can look up to."